Is it legal for Taobao to pay personal social security?

Illegal. Social insurance registration shall be managed in a territorial manner, and the account opening and payment unit shall be the "employing unit", that is, the employing unit that establishes labor relations with workers. If the labor contract is signed with the company, social insurance should also be paid in the name of the company. At present, many companies entrust a third party to pay social security fees by using a third-party social security account, which is not in compliance with the law.